Saw-filing mechanism



J. REIF.

SAW FILING MECHANISM.

APPLICATION FILED JUNE1|1920 I 1,407,1 Patented Feb. 21, 1922 4 SHEETS-SHEET I.

J. REIF.

SAW FILING MECHANISM. APPLICATION FILED JUNE I. 1920.

1 ,407,168, Patented Feb. 21, 1922.

4 SHEETS-SHEET 2.

]. BEIF.

SAW FILING MECHANISM.

APPLICATION FILED JUNE 1, 1920. 1,407,168, Patented Feb. 21, 1 922.

4 SHEETS-SHEET 3- 1. REIF. SAW FILING MECHANISM. APPLICATION FILED JUNE 1, I920.

1 ,40'7, 1 6 8, Patented Feb. 21, 1922.

4 sums-sum 4.

JOSE-PH REIF, or HEIBRON, INDIANA, nssienonor FORTY-QFIVETER OENTTO P I 1 FRANCIS E. LING, or HVEBROIN, INDI NA;

sAw-mninG MECHANISM.

Homes.

7 [0 all whomflizf mag concern Be it known that I, JOSEPH Burr, a citizen of the United States, residing at Hebron, county of Porter, and State of Indiana, have invented certain new and useful Improve ments in Saw-Filing Mechanism oi which 1 do declarethe'following to, be a full, clear and -exact description, reference being had to the accompanying drawings, forming a part of this specification.

My present invention has for its object to provide an extremely simple, durable and elfective constructionof saw filing rnechanisni, and the invention. consists in the .varions features oi novelty and cornbinationof parts hereinafter described, illustrated in i the accoin )an in drawin s and particularl e v 2:) 1D

pointed out infthe claims attheend of this sp ecificationQ Figure 1 -1s a view in front elevation of a saw filing device embodying my invena tion. ;Figui'e 2 isa detail'plan view ofa pair otja-wsfor. holding the saw blade to be filed. Figure 3 is a plan view. ofthe parts'shown in Fig. 1. Figure 1 is an en.- lai-ged detail view, partly in elevation and partly in vertical section showing the manner, of connecting the pair of saw holding jaws to a clamp for supporting the same. Figure 5' is a plan view similar toqFig. 3

but showingthe filegu'ide in reverse posi jtion. ,F igure 6 1s a [detail end vlew of the pair of clamping jaws showingthe manner of connecting 'thcse' aws together, F gure 7 is a view showing my improved in'eeha nisin in end elevation. Figure- 8. 1s a Ivie'w in vertical section on .l1ne 8-8 of Fig. 3. F'i

Of O. i g I Referrin to the drawin 's A desi nates a c: D 7 b suitaole support, such as a work bench,

whereo-n my improved mechanism will be sustained. To the oi the siipport A is connected a clamp that preferably comprises the lower and upper members B and-C that engage the opposite surfaces at the support,

A (see Fi 7). As shown. the lower niein ber 15 is orined as a plate vhavingextending upwardly therefrom a threaded bolt 15 that 1 passes through the member C and v through a hole formed ini a bracket 16 that ne 9 is a view in vertical section on line projects from one of the aws saws blade will beheld. Upon the upper end of thebolt 15 is mounted a nut 17 and Patented Feb. 21 1922;; Application med e' 1920. Serial Not-385,483. i.

to cooperate with a correspondingly; inclined part .19? fornied on the upper-portion 0fthe bracket 16, as clearlyshown in Fig ofthe;

drawings.

Whenfithe device is placed upon port-A as shown in Fig.7, the nut. 17 willvbe screwed. downward .upon the bolt ;,15- so. ,as 1 to ellect the initial clampingv of thespartsjof. the aws Band C to the support; but-thev nut .17 'will not be turned downsoiar asjto prevent (with slight effort) the vturning or swiveling of the bracket 16. upon-the .bolt 15. WVhen, however, the bracket 16 has v been, turned so as to .bringthe deyice'intoithe position. for giving 'thebestlight upon the sawor locatingthe parts where the file can be most conveniently manipulated by the operator, the cam lever 18 will be turned so as to tightly clamp the bracket 16 against the. upper jawv (l: and thus securely'retain; the saw-holding jaws and] parts carried. thereby against accidental movement; .By. reversely shifting the cam lever 18 'the savvw holding awsfand p arts. carried. thereby canv beshifted and inthis way by simplymov ing'the lever 18, the. necessity for manipulate; in the nut 17 which would require a wrench is avoided. l I 1 Theentension 1G is shown as; formedim tegral with oneoi' the .pair of saw-holding jaws D and vD that serve to securely grip;-

the saw blade W to be filed./The.jaws D and D are connected. together at their ends, 1

the connecting means at the opposite ends.

being the aine and comprising aboltZOgthati passes tl'n ough raised arm 21 projecting from the inner. jawover the corresponding end of the outerj aw andextending also. through a slot in the end of the outer, jaw? l). The outergjaw D is formed with a raised,

lug (see Fig. olhaving'aseat to receive" the offset portion of the clamping .llever,v 24 that is held upon the bolt 20... Theinut. 25

the upper threadedend of'the bolt 20. When the clamping levers 24 are in the position shown in Fig. 2 of the drawings, the saw-holding jaws D and D will be suificiently separated to permit the saw blade W to be inserted between them. \Vhen, however the clamping levers 24 are swung towards the position shown in Fig. 6 of the drawings, the jaws D and D will be brought to firm bearing against the opposite faces of the saw blade WV. By reference to Fig. 2, it will be seen that one of the jaws (the jaw D, for example) has its bearing edge slightly convexed from its center to its ends. The purpose of thus forming thej aw D is to ensure a more uniform bearing of the jaw throughout its length upon the saw blade W when the clamping levers 24 have been swung to cause the jaws to grip the blade. The convex central portion of the jaw D first bears against the saw blade and as the clamping levers 24 are swung outwardly, the bar D is slightly flexed so that a more uniform clamping of the saw blade throughout the length of the aws is secured than would be possible if the'bearing face of the'jaw D were straight from end to end. This is a feature of advantage because it insures the most rigid holding of the saw blade at all points while its teeth are being sharpened.

By reference to Figures 7 and 8, it will be seen that the saw-holding vjaw D" is formed on its under side with a rib 30 that extends from end to end of the jaw and with this rib 30 engages hook-shaped ribs 31 formed at the ends of the depending portion 32 of the sliding carriage, which as an entirety is designated F. This sliding carriage F is preferably formed as a casting of the shape shown more particularly in Figs. 3 and 80f the drawings. The raised portion 34 ofthe carriage F that extends over the jaws D and D'is formed with an extension 35 (see Fig. 8) from which de pends a pin or stud 36 on which is mounted a hand lever 37 (see Fig. 3). A spring 38 is arranged between the head of the pin 36 and the lever 37, serving to hold the upper surface of the lever in frictional engagement with the under side of the extension 35. The under surface of the lever 37' is formed with a cam rib 39 adapted to ride upon the upper face of the jaw D,

the extent to which the rib 39 overlaps the edge of the jaw D being determined by the swinging movement of the lever 37. By means of this lever 37, the carriage F can be lifted to vary the distance above the jaws D and D and thedepth of out of the file. can thereby be accurately adjusted, as

will presently more fully appear.

Through the raised portion of the carriage F passes a bolt 40 and between the headed lower end of this bolt and the raised portion 34 of the carriage is arranged a shown, this file guide comprises a lower jaw member 41 and an upper aw member 43, V

the lower member 41 being preferably formed with a boss 44 that passes through a hole in the upper member 43. The lower member 41 of the file guide is formed-with a channel-shaped extension 45 within which will rest the slide bar H of the file holder (see Fig. 8). The upper member 43 of the file guide is, formed with an extension 46 adapted to project over the slide bar H of the file holder and with a V-shaped rib 47 adapted to extend into the space between the back edge of the slide bar, H andthe inclined rear wall 48 of the channeled portion of the member 41. Upon the top of the member 43 of the file holder is arranged a plate spring fiO and through this spring passes the bolt 40, this bolt also passing through the member 41 and being provided with a wing nut 51 whereby the spring 50 can be forced to bearupon the member 43. The hole in the upper member 43 of the file holder through which the boss 44 passes is of slightly greater diameter than :the boss and upon the under side of the upper member 43 is formed a slide rib 52. The

slide bar H of the file holder by its constant reciprocation is apt to reduce or wear away the part of the upper member 43 immediately about it and when this occurs,vthe operator can remove the upper member 43 of the file guide and file away more or less the rib 52 upon the under side of the member 43. This will permit the spring 50 (which normally may be slightly bowed upwards at its center) to force theV-shaped rib 47 down the inclined portion 48 of the lower member 41 of the file guide and thus insure a snug engagement of the members of the file guide with the slide bar H. I regard it highly advantageous to use a spring, such as the spring 50 for example,-

minimum of vibration is insured and yet without suificient friction or binding of the parts to interfere with such reciprocation of the slide bar H.

The upper surface of the raised portion I 34 of the carriage F is of circular outline so as to permit the file guide G which rests thereon to turn about the bolt 40 as a center of motion, when the wing nut 51 is loosened.

The file holder that serves to securely holdthe file K by which the sharpening of the '130 k to retaintheshank 16in place on the end saw teeth will be effected. comprises the slide, barflH, .a' handle h by which the file holder is manipulated, and. offset'parts hf audit, to which the. ends of the file K are connected. (See Fig. The'olfset part it isformed with a threaded hole extending therethrough to receive the screw 60, ,this 'screwhaving a thumb nut at its upper end andhaving its inner: end provided with a seat to receive the small end of the threecorne'red file KL. The o-ffset portion, k of the fileholdertsee Figs. 3 and9) is formed.

as a casting integral with the handle it and having a seat to. receivethe end of the shankportion lc of the file and a guard pin of the .oifs'et" portioi1"h In placing the filein position within the file holder, the

shank Zciwill first be inserted, into the seat. of. the offset portion if, as shown in Fig.

3 and will then be turned down so that the shank will rest between the pin h and the outer upstanding part ofthe offset portion if. The screwoO will then "be forced .in-

ward until the point of the file is within the seat formedin the end of the screw.

From the foregoing description, the .op-

eration of the parts will-be seen'to be as follows: The saw bladeWV to be filed will be,

placedv between the working edges of the clamping jaws D' and andt-he clamping levers 24;..will then be swung outwardly from the position shown in Fig. 2 of the drawings, i

so as to. securelyandrigidly hold the saw blade. The operator can then turn the extension 16 upon the pivot bolt 15 so as tobring the parts; in most desirable position for use. f The file guidewill then be swung upon thepivot bolt :40,until the file K extends at'such angle to the'sa-w. blade W as to give the desired bevel or angle of cut to the teeth of the saw. The thumb nut 51 will then be tightened so asto securely hold the 1 file guide in this position. The hand lever 87 will be turned so as to hold the file guide at the desiredelevation above the teeth of the saw and so determine the depth of cut of the file. .Thespringpawl 42 will then be turned to the position shown in Fig. 3 of the drawings so that one of its ends will engage with the spaces between the teeth ofthe Saw bladeandserve asa gauge or check to en-.

able the operator to accurately advance the slide carriage F uniformly from end to end ofthe saw. v. y i I 7 After the sliding carriage F has thus been advanced from endt'o end of the jawsD and D'-and the operator has filed the edges of alternating teeth the file guide holder will be swung" around from the position shown in.

Fig. 3 to the positionshown in Fig. 5 of the drawings so that the alternating teeth ofthe saw blade may be properly filed or beveled.

When the file guide and holder are thus turned .to the position shown in 5 the spring pawl 42 willbe swung about its pivot- I a point so as .to bringits opposite end into en;

gagement with the teeth O Saw" the slidingcarriage will be advanced-from one end. to the other. of the clamping jaws until the filing of the teeth of the saw :blade has been completed.

My improved mechanism .aifordsa most effective means whereby the'teeth. of saws may be sharpened and insures that the cutting face of the-file is always at the proper;

angle to the vertical to.eifectamostaccurate r i and. "uniform sharpening of, the teeth. The

fileguide so holds the file, holder, asthe 1 file is reciprocated back and forth in guiding the teeth, it cannot shift lengthwise ,of,

the saw .a'nd hence the file will always cut the proper edges of the teeth at theiproper.

points or distances apart and give them the proper angle and hook The pawl-e2 being preferably of springmetal, allows thel.

file to press downoon the gforward; or, push. stroke, which is its cutting stroke, .butp er.

mits the file on the'reversestroketo ride; I

free This I regard as'an importantfeature,

although the operation of this pawl as spacing device to determine the accuratestep by step movement of the slide carriageisalso highly important, as it enables auniform spacingof the teeth tolbe ,hadl More over, by forming this pawl 4C2 asazdoubleended-pawl, one end isalways thrown-out;

of action when theother .end is turnedftq position for use.

While. I i have described what 1 regardfas,. l 0 q e P rr emb diment of m nv ti I wish it understoodjthatthe details of;oon structlon abovesetoutmay be varied. Wltlllll. A

, wide limits without departing from. the spirit of the invention and thatlfeatures of the invention may be employed without-,its

adoption as an entirety.

Having thus Letters Patent is sions at its ends, bolts passingthrough said 1 extensions of one jaw and through the ends I of the other 1aw, andzmeansat thenends of SiLlCl aws for drawlng sa1d, .aws

clamp the saw.

2. A saw filing devicecomprisingia' of longjaws fori'holding the sawblade to be filed, a'carriage shdable upononeof said.

togetherltd jaws andhaving meansfor. engagement with said jaw .in manner permitting .vertical V movement :of said carriage, and a file. gu de v .125;

adjustably mounted fupon sai se drslidable calsaw filingdevice comprising a. pair l of long jaws forholdmgthe saw blade to be filed, oneotsald. 3aws haylng alongitudlnal,

Lib adjacent its edge sliding. caifriage P,

mounted upon-said jaw and having means for engagement with said rib in manner permitting vertical movement of said carriage, a file guide pivotally mounted upon said carriage, and means for holding said file guide in adjusted position.

4. A saw filing device comprising a pair of long aws for holding the saw blade to be filed, a carriage slidable upon one of said jaws and having means for engagement with said aw in manner permitting vertical movement of said carriage, a file guide pivotally mounted upon said carriage, means for adjusting the position of said file guide with respect to said carriage, and a file holder suitably mounted in said file guide.

5. A saw filing device comprising a pair of long jaws for holding the saw blade to be filed, a carriage slidable on one of said jaws and extending above both of said jaws, means for adjusting said sliding carriage with respect to the saw blade held by said jaws, and a file guide adjustably mounted upon said carriage.

6. A saw filing device comprising a pair of long jaws for holding the saw blade to be filed, a sliding carriage connected to one of said jaws and extending above both of I said jaws, means for adjusting said sliding carriage withrespect to the saw blade held by said jaws, said means comprising an adjust-able cam, and a file guide adjustably mounted upon said carriage;

7. A saw filing device comprisinga pair of long jaws for holding the saw blade to be filed, a sliding carriage connected to one 01" said jaws and extending above both of said jaws, means for adjusting said sliding carriage with respect to the saw blade held said jaws, said means comprising a revoluble cam extending between said sliding carriage and one of said jaws, a spring exerting pressure upon said cam, and a file guide adjustably mounted upon said carriage.

8. A'saw filing device comprising a pair I of long jaws for holding the saw blade to be filed, one of said jaws having a depending rib upon its under side, a sliding carriage having a depending portion adapted to in- 'terlock with said rib, the body of said carriage extending across said jaws, a file guide adjustably mounted upon said sliding carriage, and a reciprocatory file holder carried by said file guide.

9. A saw filing device comprising a pair of long jaws for holding the saw blade to befiled, a carriage slidable upon said jaws,

a spacing pawl connected to said sliding carriage and arranged above the opposing faces of said jaws, a file guide mounted upon said sliding carriage, and a reciprocatory' file holder carried by said file guide.

10. saw filing device comprising a pair of long jaws for holding the saw blade to monies 11. A saw filing device comprising a pairof long jaws for holding the saw blade to be filed, a carriage slidable'upon said jaws, a file guide pivotally mounted upon said carriage, a file holder slidably mounted in said file guide, and means for adjusting said file guide and said file holder at different angles with respect to the saw blade to be filed.

12. A saw filing device comprising a pair of long jaws for holdingthe saw blade to be filed, a carriage slidable upon said jaws,

a spacing pawl connected to said sliding cari'iage and arranged above the opposing faces of said jaws, said spacing pawl being formed of spring metal, a'file guide mounted upon said sliding carriage, and a reciprocatory file holder carried by said file guide.

'13. A. saw filing device comprising a pair of long jaws for holding the saw blade to be filed, a sliding carriage mounted above saidj'aws, a bolt extending upwardly from said carriage, a file guide pivotally mounted upon said bolt, means for adusting the position or" said file guide with respect to said.

carriage, and a file holder slidably mounted in said file guide. i

14:. A saw filing device comprising-a pair of long for holding the saw blade to be filed, a sliding carriage mounted above said aws, a file guide ad ustablymounted.

on said sliding carriage, comprising upper and lower members having a space between them to receive a file holder, a spring for forcing said members towards each other,

and a file holder slidably mounted between said members of the file guide.

15. A saw filing device comprising a pair of long jaws for holding the saw blade to be filed, a sliding carriage mounted above. said jaws, a file guide adjustably'mounted upon said sliding carriage and comprising upper and lower members, one of said members being formed with a channel to receive a file holder and the other of said members being provided with a V-shaped rib to en gage said file holder, a bolt and nut for adjusting said members of the file guide with" respect to the file holder, and a file holder upon said bolt and comprising upper and lower members having a space between them to receive a file holder, a spring mounted upon said bolt for pressing said members. of the file guide towards each other, an ad usting nut mounted upon sald bolt; and a file holder slidably mounted betweenthe members of said file guide.

17. A saw filing device comprising a pair of long jaws for holding the "saw blade to be filed, a carriage slidable upon said jaws,

a file guideadjustably mounted on said carriage, and a file holder comprising a bar s1id-, ably mounted in said file guide, said file holder having at oneend a part to receive the shankof a file andhaving at its opposite end a screw adapted to engage the point of JOSEPH REIF. f 

